Premium
Effect of Sampling Locations on Hot Ductility of Low Carbon Alloyed Steels
Author(s) -
Zhang Hai Jie,
Zhang Li Feng,
Wang Ya Dong
Publication year - 2018
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201800052
Subject(s) - materials science , strain rate , ductility (earth science) , slab , equiaxed crystals , dynamic recrystallization , metallurgy , brittleness , continuous casting , composite material , hot working , microstructure , structural engineering , creep , engineering
Influences of steel composition and cooling rate on the steel hot ductility have been studied comprehensively. Microstructural examination reveals chill, columnar, columnar to equiaxed transition (CET) and equiaxed zones in the slab cross‐section from surface to center. Little paper reports the effect of tensile test specimens sampling position and sampling direction from the slab on the hot ductility behavior. In the current study, the hot ductility of specimens extracted from different sampling positions and different directions is detected using a thermal simulator Gleeble 1500 (Dynamic Systems, Inc., Poestenkill, NY) to determine the brittle temperature range of the steel. In addition, investigations are made currently to reveal the effect of the strain rate and holding temperature on the steel hot ductility. Some conclusions can be made in the current study: 1) the sampling position has much influence on the hot ductility behavior and the specimens extracted from the columnar zone performs the best hot ductility; 2) the hot ductility improves observably with the increasing of the strain rate, as a result of the dynamic recrystallization and dynamic stain hardening; 3) the increasing of the holding temperature performs a negative effect on the steel hot ductility.